This failed $5.3 billion nuclear power plant in Germany is now an amusement park that gets hundreds of thousands of visitors each year

The SNR-300 was supposed to be Germany's first fast breeder nuclear reactor when construction began in 1972.The reactor was made to use plutonium as fuel, and it would output 327 megawatts of energy.

Built in Kalkar, the government had some concerns about the safety of the nuclear reactor, which delayed construction. The power plant was finished in 1985 — $5.3 billion later.

But after the Chernobyl disaster in 1986, the SNR-300 never got a chance to fully operate, and by 1991 the project was officially canceled.

This left the power plant completely unused, and it was eventually sold to a Dutch investor who decided to turn it into an amusement park: Wunderland Kalkar.

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NTP: Failed German nuclear plant becomes amusement park (BI)

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This failed $5.3 billion nuclear power plant in Germany is now an amusement park that gets hundreds of thousands of visitors each year

The total size of the amusement park is 136 acres, the size of 80 football fields.

A carousel funfair ride sits idle as a nuclear power cooling tower stands beyond at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

There are a total of 40 attractions throughout the amusement park, including a log ride similar to the popular Splash Mountain at Disneyland.

Seating cushions sit stacked inside a traditional British red phone box at Wunderland Kalkar amusement park, ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

A swing ride was built inside of the cooling tower.

People ride a vertical swing funfair attraction as it stands in a nuclear power station cooling tower at Wunderland Kalkar amusement par at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

And the outside of the cooling tower was turned into a rock climbing wall that stands at 130 feet tall.

A nuclear power cooling tower stands at Wunderland Kalkar amusement park during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

People who visit the amusement park are completely safe from radiation because the power plant never actually went into production.

Children sit in a vertical swing funfair attraction as it stands in a nuclear power station cooling tower at Wunderland Kalkar amusement par at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

The amusement park also has a 450-room hotel for guests to stay at during their visit, with several restaurants and bars.

Children ride a carousel as funfair attractions operate at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Visitors are also welcome to take a tour, which teaches them all about the power plant that never was.

A funfair ride stands idle beside a former nuclear power plant building at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Wunderland Kalkar gets more than 600,000 visitors a year and opens for the season on April 9.

Funfair rides operate beside a former nuclear power plant building, left, at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

After the Fukushima disaster in 2011, Germany decided to close all of its power plants in phases by 2022.

Empty seats hang from a vertical swing funfair ride as it stands inside a nuclear power station cooling tower at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Funfair rides operate as a nuclear power cooling tower stands at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

People ride a vertical swing funfair attraction as it stands inside a cooling tower at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

A height restriction measurement marker stands at the entrance to a vertical swing funfair ride inside a nuclear power station cooling tower at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

A cartoon monkey figurine stands on top of a funfair ride inside a nuclear power cooling tower at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Passenger pods sit on a ferris wheel at Wunderland Kalkar amusement park during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

A height restriction measurement marker stands beside a funfair ride at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

People ride a vertical swing funfair attraction as it stands in a nuclear power station cooling tower at Wunderland Kalkar amusement par at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

An employee steam cleans a platform as passenger pods hang from a ferris wheel at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Pedestrians pass a souvenir shop as a nuclear power station cooling tower and funfair rides stand beyond at Wunderland Kalkar amusement par at Wunderland Kalkar amusement park in Kalkar, Germany, on Friday, April 1, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images

Empty seats hang from a vertical swing funfair ride as it stands inside a nuclear power station cooling tower at Wunderland Kalkar amusement park, during safety checks ahead of opening to the public in Kalkar, Germany, on Tuesday, March 22, 2016. The amusement park is built on the former site of nuclear power plant SNR-300, which never went online, and was constructed by Dutch entrepreneur Hennie van der Most. Photographer: Jasper Juinen/Bloomberg via Getty Images